Weak shingles clearly indicate that you need to fix the roof. If you notice any seepage in the attic, it is desirable to replace your roof rather than restoring it. It is not difficult to spot any seepage, as it causes the discoloration of your attic or makes it damp. It all depends on how soon you can spot these signs of deterioration. If spotted early, you could perhaps get your roof repaired before any serious damage is caused, otherwise be prepared to replace it. For more details visit http://evergreencontractors.com/roofing/